Skip to content

Conversation

yashuatla
Copy link
Owner

This PR contains changes from a range of commits from the original repository.

Commit Range: 78bfc83..41b26ec
Files Changed: 17 (11 programming files)
Programming Ratio: 64.7%

Commits included:

eltociear and others added 15 commits October 11, 2024 06:40
* Improve site formatting

- Separate titles with blank lines
- Separate code blocks with blank lines
- Always use ``` blocks for examples
- Use console for console (bash syntax highlighting does work well with
  example command output)
- Start console examples with $ (highlight command and output
  differently and more friendly to other shells users)

* Unify indentation in example project structure

* Use single import line in the trivial examples

When we want to show a minimal example with single import it looks
cleaner and more minimal with a single line.
* Fix --version help with CommandDisplayNameAnnotation

When setting Command.Version, a --version option is added. The help
message for the --version command did not consider the command display
name:

    Flags:
      -h, --help      help for kubectl plugin
      -v, --version   version for kubectl-plugin

With this change the help test is consistent with other flags:

    Flags:
      -h, --help      help for kubectl plugin
      -v, --version   version for kubectl plugin

* Make command DisplayName() public

This allows using the display name in templates or other code that want
to use the same value.

* Use display name in version template

The version template used `{{.Name}}` but for plugins you want to use
`{{.DisplayName}}` to be consistent with other help output.

With this change will show:

    $ kubectl plugin --version
    kubectl plugin version 1.0.0
Creating CompletionResult objects is not allowed in Powershell constrained mode, so return results as strings if constrained mode is enabled

Store results as PsCustomObjects instead of hashtables. This prevents Sort-Object from trying to convert the hashtable to a object, which is blocked in constrained mode.
PsCustomObjects are created using New-Object to work around PowerShell/PowerShell#20767
Small change to fix a couple of broken links in active_help.md

Signed-off-by: Vui Lam <[email protected]>
Since cpuguy83/go-md2man 2.0.5 no paraTag is written after "SEE ALSO".

With go-md2man 2.0.4:

.SH SEE ALSO
.PP
\fBroot-bbb(1)\fP, \fBroot-ccc(1)\fP

With go-md2man 2.0.5:

.SH SEE ALSO
\fBroot-bbb(1)\fP, \fBroot-ccc(1)\fP

See: cpuguy83/go-md2man#122

Signed-off-by: Mikel Olasagasti Uranga <[email protected]>
When running tests in verbose mode (or other options), tests involving
Cobra may fail if the test does not explicitly set Command.args to an
empty slice; in this case, Cobra defaults to using `os.Args`, which
will contain arguments passed to the test (such as `-v` (verbose)).

Commits e576205 and 1ef0913
implemented a workaround for this when running (unit) tests for Cobra
itself, but this check is specifig to Cobra (checking for `cobra.test`),
and don't work on Windows (which will have a `.exe` extension),

This patch implements a more universal check, so that users of Cobra
as a module also benefit from this workaround.

go1.21 and up provides a `testing.Testing()` utility ([1]); as the Cobra
module still supports Go1.16 and up, an alternative implementation was
added for older versions, based on golang.org/x/mod/lazyregexp [2].

Before this patch:

    go test -c -o foo.test

    ./foo.test -test.run TestNoArgs
    --- FAIL: TestNoArgs (0.00s)
        args_test.go:37: Unexpected output: Error: unknown command "TestNoArgs" for "c"
            Usage:
              c [flags]

            Flags:
              -h, --help   help for c

        args_test.go:40: Unexpected error: unknown command "TestNoArgs" for "c"
    FAIL

After this patch:

    go test -c -o foo.test

    ./foo.test -test.run TestNoArgs
    PASS

[1]: https://pkg.go.dev/testing#Testing
[2]: https://cs.opensource.google/go/x/mod/+/refs/tags/v0.19.0:internal/lazyregexp/lazyre.go;l=66-78

Signed-off-by: Sebastiaan van Stijn <[email protected]>
Signed-off-by: Marc Khouzam <[email protected]>
Co-authored-by: Marc Khouzam <[email protected]>
…pf13#2210)

The completion code attempts to detect whether a flag can be specified
more than once, and therefore should provide completion even if already
set.

Currently, this code depends on conventions used in the pflag package,
which uses an "Array" or "Slice" suffix or for some types a "stringTo"
prefix.

Cobra allows custom value types to be used, which may not use the same
convention for naming, and therefore currently aren't detected to allow
multiple values.

The pflag module defines a [SliceValue] interface, which is implemented
by the Slice and Array value types it provides (unfortunately, it's not
currently implemented by the "stringTo" values).

This patch adds a reduced interface based on the [SliceValue] interface
mentioned above to allow detecting Value-types that accept multiple values.
Custom types can implement this interface to make completion work for
those values.

I deliberately used a reduced interface to keep the requirements for this
detection as low as possible, without enforcing the other methods defined
in the interface (Append, Replace) which may not apply to all custom types.

Future improvements can likely still be made, considering either implementing
the SliceValue interface for the "stringTo" values or defining a separate
"MapValue" interface for those types.

Possibly providing the reduced interface as part of the pflag module and
to export it.

[SliceValue]: https://github.com/spf13/pflag/blob/d5e0c0615acee7028e1e2740a11102313be88de1/flag.go#L193-L203

Signed-off-by: Sebastiaan van Stijn <[email protected]>
Signed-off-by: Marc Khouzam <[email protected]>
Co-authored-by: Marc Khouzam <[email protected]>
Also document that NoFilesCompletion and FixedCompletion can be used with RegisterFlagCompletionFunc.
…her completions (spf13#1743)


Signed-off-by: Toni Kangas <[email protected]>
Signed-off-by: Marc Khouzam <[email protected]>
Co-authored-by: Marc Khouzam <[email protected]>
Co-authored-by: Jeffrey Faer <[email protected]>
…pf13#1956)

* Restructure code to let linker perform deadcode elimination step

Cobra, in its default configuration, will execute a template to generate
help, usage and version outputs. Text/template execution calls MethodByName
and MethodByName disables dead code elimination in the Go linker, therefore
all programs that make use of cobra will be linked with dead code
elimination disabled, even if they end up replacing the default usage, help
and version formatters with a custom function and no actual text/template
evaluations are ever made at runtime.

Dead code elimination in the linker helps reduce disk space and memory
utilization of programs. For example, for the simple example program used by
TestDeadcodeElimination 40% of the final executable size is dead code. For a
more realistic example, 12% of the size of Delve's executable is deadcode.

This PR changes Cobra so that, in its default configuration, it does not
automatically inhibit deadcode elimination by:

1. changing Cobra's default behavior to emit output for usage and help using
   simple Go functions instead of template execution
2. quarantining all calls to template execution into SetUsageTemplate,
   SetHelpTemplate and SetVersionTemplate so that the linker can statically
   determine if they are reachable

Co-authored-by: Marc Khouzam <[email protected]>
In the bash shell we used to print ActiveHelp messages on every
tab-press. In the example below, notice the "Command help" line which is
ActiveHelp:

bash-5.1$ tanzu context u[tab]
Command help: Configure and manage contexts for the Tanzu CLI

bash-5.1$ tanzu context u[tab]
Command help: Configure and manage contexts for the Tanzu CLI

bash-5.1$ tanzu context u
unset  (Unset the active context so that it is not used by default.)
use    (Set the context to be used by default)
bash-5.1$ tanzu context u

Above, on the first [tab] press, only the ActiveHelp is printed.
On the second [tab] press, the ActiveHelp is printed again, followed
by a re-print of the command-line, followed by the completions choices.

The separation between ActiveHelp and completion choices makes the
ActiveHelp harder to see. Furthermore, I find the double printing of the
ActiveHelp string to look bad.

Note that for zsh, the UX is different and that ActiveHelp messages are
printed at the same time as the completion choices.

This commit aligns the UX for ActiveHelp in bash with the one for zsh:
if there are other completions to be shown, the ActiveHelp messages are
printed at the same time.

New behaviour:
1- ActiveHelp is no longer printed on the first [tab] press. This is
   better aligned with bash's standard approach.
2- ActiveHelp is printed on the second [tab] press, above the completion
   choices, with a `--` delimiter.
3- If there are no completion choices, the `--` delimiter is omitted.

This behaviour is the same as what is done for zsh (except that for zsh
the first [tab] press immediately shows completion choices).

Below is the above example, but using this commit.
Notice the more concise and easier to read completion output:

bash-5.1$ tanzu context u[tab][tab]
Command help: Configure and manage contexts for the Tanzu CLI
--
unset  (Unset the active context so that it is not used by default.)
use    (Set the context to be used by default)
bash-5.1$ tanzu context u

Signed-off-by: Marc Khouzam <[email protected]>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

Successfully merging this pull request may close these issues.